This function doesn't mutate data.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/d24611b3-dddf-473a-903d-39290db03b11@p183
Signed-off-by: Jens Axboe <axboe@kernel.dk>
It is not possible to build t10-pi.ko anymore.
This file doesn't even export functions.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/216ccc79-5b80-47b2-b507-990951aa810c@p183
Signed-off-by: Jens Axboe <axboe@kernel.dk>
ublk zoned takes 16 bytes in each request pdu just for handling REPORT_ZONE
operation, this way does waste memory since request pdu is allocated
statically.
Store the transient zone report data into one global xarray, and remove
it after the report zone request is completed. This way is reasonable
since report zone is run in slow code path.
Fixes: 29802d7ca3 ("ublk: enable zoned storage support")
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Andreas Hindborg <a.hindborg@samsung.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20240812013624.587587-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Commit b411b3637f ("The DRBD driver") declared but never implemented
drbd_read_remote(), is_valid_ar_handle() and drbd_set_recv_tcq().
And commit 668700b40a ("drbd: Create a dedicated workqueue for sending acks on the control connection")
never implemented drbd_send_ping_wf().
Commit 2451fc3b2b ("drbd: Removed the BIO_RW_BARRIER support form the receiver/epoch code")
leave w_e_reissue() declaration unused.
Commit 8fe605513a ("drbd: Rename drbdd_init() -> drbd_receiver()")
rename drbdd_init() and leave unsued declaration. Also drbd_asender() is removed in
commit 1c03e52083 ("drbd: Rename asender to ack_receiver").
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20240802095147.2788218-1-yuehaibing@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The NBD protocol defines the flag NBD_FLAG_ROTATIONAL to flag that the
export in use should be treated as a rotational device.
Add support for that flag to the kernel driver.
Signed-off-by: Wouter Verhelst <w@uter.be>
Reviewed-by: Eric Blake <eblake@redhat.com>
Link: https://lore.kernel.org/r/20240725164536.1275851-1-w@uter.be
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Currently _drbd_send_page() use sendpage_ok() in order to enable
MSG_SPLICE_PAGES, it check the first page of the iterator, the iterator
may represent contiguous pages.
MSG_SPLICE_PAGES enables skb_splice_from_iter() which checks all the
pages it sends with sendpage_ok().
When _drbd_send_page() sends an iterator that the first page is
sendable, but one of the other pages isn't skb_splice_from_iter() warns
and aborts the data transfer.
Using the new helper sendpages_ok() in order to enable MSG_SPLICE_PAGES
solves the issue.
Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Signed-off-by: Ofir Gal <ofir.gal@volumez.com>
Link: https://lore.kernel.org/r/20240718084515.3833733-4-ofir.gal@volumez.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Currently nvme_tcp_try_send_data() use sendpage_ok() in order to disable
MSG_SPLICE_PAGES, it check the first page of the iterator, the iterator
may represent contiguous pages.
MSG_SPLICE_PAGES enables skb_splice_from_iter() which checks all the
pages it sends with sendpage_ok().
When nvme_tcp_try_send_data() sends an iterator that the first page is
sendable, but one of the other pages isn't skb_splice_from_iter() warns
and aborts the data transfer.
Using the new helper sendpages_ok() in order to disable MSG_SPLICE_PAGES
solves the issue.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ofir Gal <ofir.gal@volumez.com>
Link: https://lore.kernel.org/r/20240718084515.3833733-3-ofir.gal@volumez.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Network drivers are using sendpage_ok() to check the first page of an
iterator in order to disable MSG_SPLICE_PAGES. The iterator can
represent list of contiguous pages.
When MSG_SPLICE_PAGES is enabled skb_splice_from_iter() is being used,
it requires all pages in the iterator to be sendable. Therefore it needs
to check that each page is sendable.
The patch introduces a helper sendpages_ok(), it returns true if all the
contiguous pages are sendable.
Drivers who want to send contiguous pages with MSG_SPLICE_PAGES may use
this helper to check whether the page list is OK. If the helper does not
return true, the driver should remove MSG_SPLICE_PAGES flag.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ofir Gal <ofir.gal@volumez.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20240718084515.3833733-2-ofir.gal@volumez.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
ioprio works on the blk-cgroup level, all disks in the same cgroup
are the same, and the struct ioprio_blkg doesn't have anything in it.
Hence register the policy is enough, because cpd_alloc/free_fn will
be handled for each blk-cgroup, and there is no need to activate the
policy for disk. Hence remove blk_ioprio_init/exit and
ioprio_alloc/free_pd.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240719071506.158075-4-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Currently, if config is enabled, then ioprio is always enabled by
default from blkcg_init_disk(), hence there is no point to check if
the policy is enabled from blkg in ioprio_blkcg_from_bio(). Hence remove
it and get blkcg directly from bio.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240719071506.158075-3-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Currently all policies implement pd_(alloc|free)_fn, however, this is
not necessary for ioprio that only works for blkcg, not blkg.
There are no functional changes, prepare to cleanup activating ioprio
policy.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20240719071506.158075-2-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Fix RPM package build error caused by an incorrect locale setup
- Mark modules.weakdep as ghost in RPM package
- Fix the odd combination of -S and -c in stack protector scripts, which
is an error with the latest Clang
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Merge tag 'kbuild-fixes-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Fix RPM package build error caused by an incorrect locale setup
- Mark modules.weakdep as ghost in RPM package
- Fix the odd combination of -S and -c in stack protector scripts,
which is an error with the latest Clang
* tag 'kbuild-fixes-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: Fix '-S -c' in x86 stack protector scripts
kbuild: rpm-pkg: ghost modules.weakdep file
kbuild: rpm-pkg: Fix C locale setup
This simplifies the min_t() and max_t() macros by no longer making them
work in the context of a C constant expression.
That means that you can no longer use them for static initializers or
for array sizes in type definitions, but there were only a couple of
such uses, and all of them were converted (famous last words) to use
MIN_T/MAX_T instead.
Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 3a7e02c040 ("minmax: avoid overly complicated constant
expressions in VM code") added the simpler MIN_T/MAX_T macros in order
to avoid some excessive expansion from the rather complicated regular
min/max macros.
The complexity of those macros stems from two issues:
(a) trying to use them in situations that require a C constant
expression (in static initializers and for array sizes)
(b) the type sanity checking
and MIN_T/MAX_T avoids both of these issues.
Now, in the whole (long) discussion about all this, it was pointed out
that the whole type sanity checking is entirely unnecessary for
min_t/max_t which get a fixed type that the comparison is done in.
But that still leaves min_t/max_t unnecessarily complicated due to
worries about the C constant expression case.
However, it turns out that there really aren't very many cases that use
min_t/max_t for this, and we can just force-convert those.
This does exactly that.
Which in turn will then allow for much simpler implementations of
min_t()/max_t(). All the usual "macros in all upper case will evaluate
the arguments multiple times" rules apply.
We should do all the same things for the regular min/max() vs MIN/MAX()
cases, but that has the added complexity of various drivers defining
their own local versions of MIN/MAX, so that needs another level of
fixes first.
Link: https://lore.kernel.org/all/b47fad1d0cf8449886ad148f8c013dae@AcuMS.aculab.com/
Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Many fixes for power-cut issues by Zhihao Cheng
- Another ubiblock error path fix
- ubiblock section mismatch fix
- Misc fixes all over the place
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Merge tag 'ubifs-for-linus-6.11-rc1-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI and UBIFS updates from Richard Weinberger:
- Many fixes for power-cut issues by Zhihao Cheng
- Another ubiblock error path fix
- ubiblock section mismatch fix
- Misc fixes all over the place
* tag 'ubifs-for-linus-6.11-rc1-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubi: Fix ubi_init() ubiblock_exit() section mismatch
ubifs: add check for crypto_shash_tfm_digest
ubifs: Fix inconsistent inode size when powercut happens during appendant writing
ubi: block: fix null-pointer-dereference in ubiblock_create()
ubifs: fix kernel-doc warnings
ubifs: correct UBIFS_DFS_DIR_LEN macro definition and improve code clarity
mtd: ubi: Restore missing cleanup on ubi_init() failure path
ubifs: dbg_orphan_check: Fix missed key type checking
ubifs: Fix unattached inode when powercut happens in creating
ubifs: Fix space leak when powercut happens in linking tmpfile
ubifs: Move ui->data initialization after initializing security
ubifs: Fix adding orphan entry twice for the same inode
ubifs: Remove insert_dead_orphan from replaying orphan process
Revert "ubifs: ubifs_symlink: Fix memleak of inode->i_link in error path"
ubifs: Don't add xattr inode into orphan area
ubifs: Fix unattached xattr inode if powercut happens after deleting
mtd: ubi: avoid expensive do_div() on 32-bit machines
mtd: ubi: make ubi_class constant
ubi: eba: properly rollback inside self_check_eba
After a recent change in clang to stop consuming all instances of '-S'
and '-c' [1], the stack protector scripts break due to the kernel's use
of -Werror=unused-command-line-argument to catch cases where flags are
not being properly consumed by the compiler driver:
$ echo | clang -o - -x c - -S -c -Werror=unused-command-line-argument
clang: error: argument unused during compilation: '-c' [-Werror,-Wunused-command-line-argument]
This results in CONFIG_STACKPROTECTOR getting disabled because
CONFIG_CC_HAS_SANE_STACKPROTECTOR is no longer set.
'-c' and '-S' both instruct the compiler to stop at different stages of
the pipeline ('-S' after compiling, '-c' after assembling), so having
them present together in the same command makes little sense. In this
case, the test wants to stop before assembling because it is looking at
the textual assembly output of the compiler for either '%fs' or '%gs',
so remove '-c' from the list of arguments to resolve the error.
All versions of GCC continue to work after this change, along with
versions of clang that do or do not contain the change mentioned above.
Cc: stable@vger.kernel.org
Fixes: 4f7fd4d7a7 ("[PATCH] Add the -fstack-protector option to the CFLAGS")
Fixes: 60a5317ff0 ("x86: implement x86_32 stack protector")
Link: 6461e53781 [1]
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Since ubiblock_exit() is now called from an init function,
the __exit section no longer makes sense.
Cc: Ben Hutchings <bwh@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202407131403.wZJpd8n2-lkp@intel.com/
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Enable turbostat extensions to add both perf and PMT
(Intel Platform Monitoring Technology) counters via the cmdline.
Demonstrate PMT access with built-in support for Meteor Lake's Die%c6 counter.
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Merge tag 'v6.11-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull turbostat updates from Len Brown:
- Enable turbostat extensions to add both perf and PMT (Intel
Platform Monitoring Technology) counters via the cmdline
- Demonstrate PMT access with built-in support for Meteor Lake's
Die C6 counter
* tag 'v6.11-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power turbostat: version 2024.07.26
tools/power turbostat: Include umask=%x in perf counter's config
tools/power turbostat: Document PMT in turbostat.8
tools/power turbostat: Add MTL's PMT DC6 builtin counter
tools/power turbostat: Add early support for PMT counters
tools/power turbostat: Add selftests for added perf counters
tools/power turbostat: Add selftests for SMI, APERF and MPERF counters
tools/power turbostat: Move verbose counter messages to level 2
tools/power turbostat: Move debug prints from stdout to stderr
tools/power turbostat: Fix typo in turbostat.8
tools/power turbostat: Add perf added counter example to turbostat.8
tools/power turbostat: Fix formatting in turbostat.8
tools/power turbostat: Extend --add option with perf counters
tools/power turbostat: Group SMI counter with APERF and MPERF
tools/power turbostat: Add ZERO_ARRAY for zero initializing builtin array
tools/power turbostat: Replace enum rapl_source and cstate_source with counter_source
tools/power turbostat: Remove anonymous union from rapl_counter_info_t
tools/power/turbostat: Switch to new Intel CPU model defines
New Changes:
- Refactor to a common struct for DRAM and general media CXL events
- Add abstract distance calculation support for CXL
- Add CXL maturity map documentation to detail current state of CXL enabling
- Add warning on mixed CXL VH and RCH/RCD hierachy to inform unsupported config
- Replace ENXIO with EBUSY for inject poison limit reached via debugfs
- Replace ENXIO with EBUSY for inject poison cxl-test support
- XOR math fixup for DPA to SPA translation. Current math works for MODULO arithmetic
where HPA==SPA, however not for XOR decode.
- Move pci config read in cxl_dvsec_rr_decode() to avoid unnecessary acess
Fixes:
- Add a fix to address race condition in CXL memory hotplug notifier
- Add missing MODULE_DESCRIPTION() for CXL modules
- Fix incorrect vendor debug UUID define
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Merge tag 'cxl-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull CXL updates from Dave Jiang:
"Core:
- A CXL maturity map has been added to the documentation to detail
the current state of CXL enabling.
It provides the status of the current state of various CXL features
to inform current and future contributors of where things are and
which areas need contribution.
- A notifier handler has been added in order for a newly created CXL
memory region to trigger the abstract distance metrics calculation.
This should bring parity for CXL memory to the same level vs
hotplugged DRAM for NUMA abstract distance calculation. The
abstract distance reflects relative performance used for memory
tiering handling.
- An addition for XOR math has been added to address the CXL DPA to
SPA translation.
CXL address translation did not support address interleave math
with XOR prior to this change.
Fixes:
- Fix to address race condition in the CXL memory hotplug notifier
- Add missing MODULE_DESCRIPTION() for CXL modules
- Fix incorrect vendor debug UUID define
Misc:
- A warning has been added to inform users of an unsupported
configuration when mixing CXL VH and RCH/RCD hierarchies
- The ENXIO error code has been replaced with EBUSY for inject poison
limit reached via debugfs and cxl-test support
- Moving the PCI config read in cxl_dvsec_rr_decode() to avoid
unnecessary PCI config reads
- A refactor to a common struct for DRAM and general media CXL
events"
* tag 'cxl-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
cxl/core/pci: Move reading of control register to immediately before usage
cxl: Remove defunct code calculating host bridge target positions
cxl/region: Verify target positions using the ordered target list
cxl: Restore XOR'd position bits during address translation
cxl/core: Fold cxl_trace_hpa() into cxl_dpa_to_hpa()
cxl/test: Replace ENXIO with EBUSY for inject poison limit reached
cxl/memdev: Replace ENXIO with EBUSY for inject poison limit reached
cxl/acpi: Warn on mixed CXL VH and RCH/RCD Hierarchy
cxl/core: Fix incorrect vendor debug UUID define
Documentation: CXL Maturity Map
cxl/region: Simplify cxl_region_nid()
cxl/region: Support to calculate memory tier abstract distance
cxl/region: Fix a race condition in memory hotplug notifier
cxl: add missing MODULE_DESCRIPTION() macros
cxl/events: Use a common struct for DRAM and General Media events
Ben Dooks and Jeff Johnson.
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Merge tag 'unicode-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/krisman/unicode
Pull unicode update from Gabriel Krisman Bertazi:
"Two small fixes to silence the compiler and static analyzers tools
from Ben Dooks and Jeff Johnson"
* tag 'unicode-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/krisman/unicode:
unicode: add MODULE_DESCRIPTION() macros
unicode: make utf8 test count static
In the same way as for other similar files, mark as ghost the new file
generated by depmod for configured weak dependencies for modules,
modules.weakdep, so that although it is not included in the package,
claim the ownership on it.
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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Merge tag '6.11-rc-smb-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull more smb client updates from Steve French:
- fix for potential null pointer use in init cifs
- additional dynamic trace points to improve debugging of some common
scenarios
- two SMB1 fixes (one addressing reconnect with POSIX extensions, one a
mount parsing error)
* tag '6.11-rc-smb-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
smb3: add dynamic trace point for session setup key expired failures
smb3: add four dynamic tracepoints for copy_file_range and reflink
smb3: add dynamic tracepoint for reflink errors
cifs: mount with "unix" mount option for SMB1 incorrectly handled
cifs: fix reconnect with SMB1 UNIX Extensions
cifs: fix potential null pointer use in destroy_workqueue in init_cifs error path
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Merge tag 'block-6.11-20240726' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
- NVMe pull request via Keith:
- Fix request without payloads cleanup (Leon)
- Use new protection information format (Francis)
- Improved debug message for lost pci link (Bart)
- Another apst quirk (Wang)
- Use appropriate sysfs api for printing chars (Markus)
- ublk async device deletion fix (Ming)
- drbd kerneldoc fixups (Simon)
- Fix deadlock between sd removal and release (Yang)
* tag 'block-6.11-20240726' of git://git.kernel.dk/linux:
nvme-pci: add missing condition check for existence of mapped data
ublk: fix UBLK_CMD_DEL_DEV_ASYNC handling
block: fix deadlock between sd_remove & sd_release
drbd: Add peer_device to Kernel doc
nvme-core: choose PIF from QPIF if QPIFS supports and PIF is QTYPE
nvme-pci: Fix the instructions for disabling power management
nvme: remove redundant bdev local variable
nvme-fabrics: Use seq_putc() in __nvmf_concat_opt_tokens()
nvme/pci: Add APST quirk for Lenovo N60z laptop
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Merge tag 'io_uring-6.11-20240726' of git://git.kernel.dk/linux
Pull io_uring fixes from Jens Axboe:
- Fix a syzbot issue for the msg ring cache added in this release. No
ill effects from this one, but it did make KMSAN unhappy (me)
- Sanitize the NAPI timeout handling, by unifying the value handling
into all ktime_t rather than converting back and forth (Pavel)
- Fail NAPI registration for IOPOLL rings, it's not supported (Pavel)
- Fix a theoretical issue with ring polling and cancelations (Pavel)
- Various little cleanups and fixes (Pavel)
* tag 'io_uring-6.11-20240726' of git://git.kernel.dk/linux:
io_uring/napi: pass ktime to io_napi_adjust_timeout
io_uring/napi: use ktime in busy polling
io_uring/msg_ring: fix uninitialized use of target_req->flags
io_uring: align iowq and task request error handling
io_uring: kill REQ_F_CANCEL_SEQ
io_uring: simplify io_uring_cmd return
io_uring: fix io_match_task must_hold
io_uring: don't allow netpolling with SETUP_IOPOLL
io_uring: tighten task exit cancellations
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Merge tag 'vfs-6.11-rc1.fixes.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
"This contains two fixes for this merge window:
VFS:
- I noticed that it is possible for a privileged user to mount most
filesystems with a non-initial user namespace in sb->s_user_ns.
When fsopen() is called in a non-init namespace the caller's
namespace is recorded in fs_context->user_ns. If the returned file
descriptor is then passed to a process privileged in init_user_ns,
that process can call fsconfig(fd_fs, FSCONFIG_CMD_CREATE*),
creating a new superblock with sb->s_user_ns set to the namespace
of the process which called fsopen().
This is problematic as only filesystems that raise FS_USERNS_MOUNT
are known to be able to support a non-initial s_user_ns. Others may
suffer security issues, on-disk corruption or outright crash the
kernel. Prevent that by restricting such delegation to filesystems
that allow FS_USERNS_MOUNT.
Note, that this delegation requires a privileged process to
actually create the superblock so either the privileged process is
cooperaing or someone must have tricked a privileged process into
operating on a fscontext file descriptor whose origin it doesn't
know (a stupid idea).
The bug dates back to about 5 years afaict.
Misc:
- Fix hostfs parsing when the mount request comes in via the legacy
mount api.
In the legacy mount api hostfs allows to specify the host directory
mount without any key.
Restore that behavior"
* tag 'vfs-6.11-rc1.fixes.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
hostfs: fix the host directory parse when mounting.
fs: don't allow non-init s_user_ns for filesystems without FS_USERNS_MOUNT
The highlight is the establishment of a minimum version for the Rust
toolchain, including 'rustc' (and bundled tools) and 'bindgen'.
The initial minimum will be the pinned version we currently have, i.e.
we are just widening the allowed versions. That covers 3 stable Rust
releases: 1.78.0, 1.79.0, 1.80.0 (getting released tomorrow), plus beta,
plus nightly.
This should already be enough for kernel developers in distributions
that provide recent Rust compiler versions routinely, such as Arch
Linux, Debian Unstable (outside the freeze period), Fedora Linux,
Gentoo Linux (especially the testing channel), Nix (unstable) and
openSUSE Slowroll and Tumbleweed.
In addition, the kernel is now being built-tested by Rust's pre-merge
CI. That is, every change that is attempting to land into the Rust
compiler is tested against the kernel, and it is merged only if it
passes. Similarly, the bindgen tool has agreed to build the kernel in
their CI too.
Thus, with the pre-merge CI in place, both projects hope to avoid
unintentional changes to Rust that break the kernel. This means that,
in general, apart from intentional changes on their side (that we
will need to workaround conditionally on our side), the upcoming Rust
compiler versions should generally work.
In addition, the Rust project has proposed getting the kernel into
stable Rust (at least solving the main blockers) as one of its three
flagship goals for 2024H2 [1].
I would like to thank Niko, Sid, Emilio et al. for their help promoting
the collaboration between Rust and the kernel.
[1] https://rust-lang.github.io/rust-project-goals/2024h2/index.html#flagship-goals
Toolchain and infrastructure:
- Support several Rust toolchain versions.
- Support several bindgen versions.
- Remove 'cargo' requirement and simplify 'rusttest', thanks to 'alloc'
having been dropped last cycle.
- Provide proper error reporting for the 'rust-analyzer' target.
'kernel' crate:
- Add 'uaccess' module with a safe userspace pointers abstraction.
- Add 'page' module with a 'struct page' abstraction.
- Support more complex generics in workqueue's 'impl_has_work!' macro.
'macros' crate:
- Add 'firmware' field support to the 'module!' macro.
- Improve 'module!' macro documentation.
Documentation:
- Provide instructions on what packages should be installed to build
the kernel in some popular Linux distributions.
- Introduce the new kernel.org LLVM+Rust toolchains.
- Explain '#[no_std]'.
And a few other small bits.
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Merge tag 'rust-6.11' of https://github.com/Rust-for-Linux/linux
Pull Rust updates from Miguel Ojeda:
"The highlight is the establishment of a minimum version for the Rust
toolchain, including 'rustc' (and bundled tools) and 'bindgen'.
The initial minimum will be the pinned version we currently have, i.e.
we are just widening the allowed versions. That covers three stable
Rust releases: 1.78.0, 1.79.0, 1.80.0 (getting released tomorrow),
plus beta, plus nightly.
This should already be enough for kernel developers in distributions
that provide recent Rust compiler versions routinely, such as Arch
Linux, Debian Unstable (outside the freeze period), Fedora Linux,
Gentoo Linux (especially the testing channel), Nix (unstable) and
openSUSE Slowroll and Tumbleweed.
In addition, the kernel is now being built-tested by Rust's pre-merge
CI. That is, every change that is attempting to land into the Rust
compiler is tested against the kernel, and it is merged only if it
passes. Similarly, the bindgen tool has agreed to build the kernel in
their CI too.
Thus, with the pre-merge CI in place, both projects hope to avoid
unintentional changes to Rust that break the kernel. This means that,
in general, apart from intentional changes on their side (that we will
need to workaround conditionally on our side), the upcoming Rust
compiler versions should generally work.
In addition, the Rust project has proposed getting the kernel into
stable Rust (at least solving the main blockers) as one of its three
flagship goals for 2024H2 [1].
I would like to thank Niko, Sid, Emilio et al. for their help
promoting the collaboration between Rust and the kernel.
Toolchain and infrastructure:
- Support several Rust toolchain versions.
- Support several bindgen versions.
- Remove 'cargo' requirement and simplify 'rusttest', thanks to
'alloc' having been dropped last cycle.
- Provide proper error reporting for the 'rust-analyzer' target.
'kernel' crate:
- Add 'uaccess' module with a safe userspace pointers abstraction.
- Add 'page' module with a 'struct page' abstraction.
- Support more complex generics in workqueue's 'impl_has_work!'
macro.
'macros' crate:
- Add 'firmware' field support to the 'module!' macro.
- Improve 'module!' macro documentation.
Documentation:
- Provide instructions on what packages should be installed to build
the kernel in some popular Linux distributions.
- Introduce the new kernel.org LLVM+Rust toolchains.
- Explain '#[no_std]'.
And a few other small bits"
Link: https://rust-lang.github.io/rust-project-goals/2024h2/index.html#flagship-goals [1]
* tag 'rust-6.11' of https://github.com/Rust-for-Linux/linux: (26 commits)
docs: rust: quick-start: add section on Linux distributions
rust: warn about `bindgen` versions 0.66.0 and 0.66.1
rust: start supporting several `bindgen` versions
rust: work around `bindgen` 0.69.0 issue
rust: avoid assuming a particular `bindgen` build
rust: start supporting several compiler versions
rust: simplify Clippy warning flags set
rust: relax most deny-level lints to warnings
rust: allow `dead_code` for never constructed bindings
rust: init: simplify from `map_err` to `inspect_err`
rust: macros: indent list item in `paste!`'s docs
rust: add abstraction for `struct page`
rust: uaccess: add typed accessors for userspace pointers
uaccess: always export _copy_[from|to]_user with CONFIG_RUST
rust: uaccess: add userspace pointers
kbuild: rust-analyzer: improve comment documentation
kbuild: rust-analyzer: better error handling
docs: rust: no_std is used
rust: alloc: add __GFP_HIGHMEM flag
rust: alloc: fix typo in docs for GFP_NOWAIT
...
+ Cleanups
- optimization: try to avoid refing the label in apparmor_file_open
- remove useless static inline function is_deleted
- use kvfree_sensitive to free data->data
- fix typo in kernel doc
+ Bug fixes
- unpack transition table if dfa is not present
- test: add MODULE_DESCRIPTION()
- take nosymfollow flag into account
- fix possible NULL pointer dereference
- fix null pointer deref when receiving skb during sock creation
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Merge tag 'apparmor-pr-2024-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor
Pull apparmor updates from John Johansen:
"Cleanups
- optimization: try to avoid refing the label in apparmor_file_open
- remove useless static inline function is_deleted
- use kvfree_sensitive to free data->data
- fix typo in kernel doc
Bug fixes:
- unpack transition table if dfa is not present
- test: add MODULE_DESCRIPTION()
- take nosymfollow flag into account
- fix possible NULL pointer dereference
- fix null pointer deref when receiving skb during sock creation"
* tag 'apparmor-pr-2024-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor:
apparmor: unpack transition table if dfa is not present
apparmor: try to avoid refing the label in apparmor_file_open
apparmor: test: add MODULE_DESCRIPTION()
apparmor: take nosymfollow flag into account
apparmor: fix possible NULL pointer dereference
apparmor: fix typo in kernel doc
apparmor: remove useless static inline function is_deleted
apparmor: use kvfree_sensitive to free data->data
apparmor: Fix null pointer deref when receiving skb during sock creation
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Merge tag 'landlock-6.11-rc1-houdini-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux
Pull landlock fix from Mickaël Salaün:
"Jann Horn reported a sandbox bypass for Landlock. This includes the
fix and new tests. This should be backported"
* tag 'landlock-6.11-rc1-houdini-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
selftests/landlock: Add cred_transfer test
landlock: Don't lose track of restrictions on cred_transfer
- don't use sprintf() with non-constant format string
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Merge tag 'gpio-fixes-for-v6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fix from Bartosz Golaszewski:
- don't use sprintf() with non-constant format string
* tag 'gpio-fixes-for-v6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: virtuser: avoid non-constant format string
- Treewide conversion of of_property_for_each_u32() to drop internal
arguments making struct property opaque
- Add binding for Amlogic A4 SoC watchdog
- Fix constraints for AD7192 'single-channel' property
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Merge tag 'devicetree-fixes-for-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull more devicetree updates from Rob Herring:
"Most of this is a treewide change to of_property_for_each_u32() which
was small enough to do in one go before rc1 and avoids the need to
create of_property_for_each_u32_some_new_name().
- Treewide conversion of of_property_for_each_u32() to drop internal
arguments making struct property opaque
- Add binding for Amlogic A4 SoC watchdog
- Fix constraints for AD7192 'single-channel' property"
* tag 'devicetree-fixes-for-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: iio: adc: ad7192: Fix 'single-channel' constraints
of: remove internal arguments from of_property_for_each_u32()
dt-bindings: watchdog: add support for Amlogic A4 SoCs
- Fix NULL dereference when freeing domain in Unisoc SPRD driver.
- Separate assignment statements with semicolons in AMD page-table code.
- Fix Tegra erratum workaround when the CPU is using 16KiB pages.
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Merge tag 'iommu-fixes-v6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux
Pull iommu fixes from Will Deacon:
"We're still resolving a regression with the handling of unexpected
page faults on SMMUv3, but we're not quite there with a fix yet.
- Fix NULL dereference when freeing domain in Unisoc SPRD driver
- Separate assignment statements with semicolons in AMD page-table
code
- Fix Tegra erratum workaround when the CPU is using 16KiB pages"
* tag 'iommu-fixes-v6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux:
iommu: arm-smmu: Fix Tegra workaround for PAGE_SIZE mappings
iommu/amd: Convert comma to semicolon
iommu: sprd: Avoid NULL deref in sprd_iommu_hw_en
Two commits are included to fix some regressions. These commits should also
be applied to the v6.10 kernel as well.
The recent integration of compiler collections introduced the technology
to check flexible array length at runtime by providing proper annotations.
In v6.10 kernel, a patch was merged into firewire subsystem to utilize it,
however the annotation was inadequate. There is also the related change for
the flexible array in sound subsystem, but it causes a regression where
the data in the payload of isochronous packet is incorrect for some
devices. These bugs are now fixed.
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Merge tag 'firewire-fixes-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire fixes from Takashi Sakamoto:
"The recent integration of compiler collections introduced the
technology to check flexible array length at runtime by providing
proper annotations. In v6.10 kernel, a patch was merged into firewire
subsystem to utilize it, however the annotation was inadequate.
There is also the related change for the flexible array in sound
subsystem, but it causes a regression where the data in the payload of
isochronous packet is incorrect for some devices. These bugs are now
fixed"
* tag 'firewire-fixes-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
ALSA: firewire-lib: fix wrong value as length of header for CIP_NO_HEADER case
Revert "firewire: Annotate struct fw_iso_packet with __counted_by()"
The bulk of this is a series of fixes for the microchip-core driver
mostly originating from one of their customers, I also applied an
additional patch adding support for controlling the word size which came
along with it since it's still the merge window and clearly had a bunch
of fairly thorough testing.
We also have a fix for the compatible used to bind spidev to the
BH2228FV.
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Merge tag 'spi-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"The bulk of this is a series of fixes for the microchip-core driver
mostly originating from one of their customers, I also applied an
additional patch adding support for controlling the word size which
came along with it since it's still the merge window and clearly had a
bunch of fairly thorough testing.
We also have a fix for the compatible used to bind spidev to the
BH2228FV"
* tag 'spi-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: spidev: add correct compatible for Rohm BH2228FV
dt-bindings: trivial-devices: fix Rohm BH2228FV compatible string
spi: microchip-core: add support for word sizes of 1 to 32 bits
spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
spi: microchip-core: fix init function not setting the master and motorola modes
spi: microchip-core: only disable SPI controller when register value change requires it
spi: microchip-core: defer asserting chip select until just before write to TX FIFO
spi: microchip-core: fix the issues in the isr
These two commits clean up the excessively loose dependencies for the
RZG2L USB VBCTRL regulator driver, ensuring it shouldn't prompt for
people who can't use it.
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Merge tag 'regulator-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"These two commits clean up the excessively loose dependencies for the
RZG2L USB VBCTRL regulator driver, ensuring it shouldn't prompt for
people who can't use it"
* tag 'regulator-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: Further restrict RZG2L USB VBCTRL regulator dependencies
regulator: renesas-usb-vbus-regulator: Update the default
Arnd sent a workaround for a false positive warning which was showing up
with GCC 14.1.
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Merge tag 'regmap-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap fix from Mark Brown:
"Arnd sent a workaround for a false positive warning which was showing
up with GCC 14.1"
* tag 'regmap-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: maple: work around gcc-14.1 false-positive warning
some SoCs.
- Initialize struct clk_init_data in the TI da8xx-cfgchip driver so
that stack contents aren't used for things like clk flags leading to
unexpected behavior
- Don't leak stack contents in a debug print in the new Sophgo clk
driver
- Disable the new T-Head clk driver on 32-bit targets to fix the build
due to a division
- Fix Samsung Exynos4 fin_pll wreckage from the clkdev rework done last
cycle by using a struct clk_hw directly instead of a struct clk
consumer
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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A few clk driver fixes for the merge window to fix the build and boot
on some SoCs.
- Initialize struct clk_init_data in the TI da8xx-cfgchip driver so
that stack contents aren't used for things like clk flags leading
to unexpected behavior
- Don't leak stack contents in a debug print in the new Sophgo clk
driver
- Disable the new T-Head clk driver on 32-bit targets to fix the
build due to a division
- Fix Samsung Exynos4 fin_pll wreckage from the clkdev rework done
last cycle by using a struct clk_hw directly instead of a struct
clk consumer"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: samsung: fix getting Exynos4 fin_pll rate from external clocks
clk: T-Head: Disable on 32-bit Targets
clk: sophgo: clk-sg2042-pll: Fix uninitialized variable in debug output
clk: davinci: da8xx-cfgchip: Initialize clk_init_data before use
Drivers:
- dw: optional apb clock and power management support, IBI handling fixes
- mipi-i3c-hci: IBI handling fixes
- svc: few fixes
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Merge tag 'i3c/for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
Pull i3c updates from Alexandre Belloni:
"This cycle, there are new features for the Designware controller and
fixes for the other IPs:
- dw: optional apb clock and power management support, IBI handling
fixes
- mipi-i3c-hci: IBI handling fixes
- svc: a few fixes"
* tag 'i3c/for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
dt-bindings: i3c: add header for generic I3C flags
i3c: master: svc: Fix error code in svc_i3c_master_do_daa_locked()
i3c: master: Enhance i3c_bus_type visibility for device searching & event monitoring
i3c: dw: Add power management support
i3c: dw: Add some functions for reusability
i3c: dw: Save timing registers and other values
i3c: master: svc: Improve DAA STOP handle code logic
i3c: dw: Add optional apb clock
i3c: dw: Use new *_enabled clk API
dt-bindings: i3c: dw: Add apb clock binding
i3c: master: svc: Convert comma to semicolon
i3c: mipi-i3c-hci: Round IBI data chunk size to HW supported value
i3c: mipi-i3c-hci: Error out instead on BUG_ON() in IBI DMA setup
i3c: mipi-i3c-hci: Set IBI Status and Data Ring base addresses
i3c: mipi-i3c-hci: Switch to lower_32_bits()/upper_32_bits() helpers
i3c: dw: Remove ibi_capable property
i3c: dw: Fix IBI intr programming
i3c: dw: Fix clearing queue thld
i3c: mipi-i3c-hci: Fix number of DAT/DCT entries for HCI versions < 1.1
i3c: master: svc: resend target address when get NACK
Prevent the thermal core from flooding the kernel log with useless
messages if thermal zone temperature can never be determined (or its
sensor has failed permanently) and make it finally give up and disable
defective thermal zones (Rafael Wysocki).
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Merge tag 'thermal-6.11-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control fix from Rafael Wysocki:
"Prevent the thermal core from flooding the kernel log with useless
messages if thermal zone temperature can never be determined (or its
sensor has failed permanently) and make it finally give up and disable
defective thermal zones (Rafael Wysocki)"
* tag 'thermal-6.11-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: core: Back off when polling thermal zones on errors
thermal: trip: Split thermal_zone_device_set_mode()
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Merge tag 'mm-hotfixes-stable-2024-07-26-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc hotfixes from Andrew Morton:
"11 hotfixes, 7 of which are cc:stable. 7 are MM, 4 are other"
* tag 'mm-hotfixes-stable-2024-07-26-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
nilfs2: handle inconsistent state in nilfs_btnode_create_block()
selftests/mm: skip test for non-LPA2 and non-LVA systems
mm/page_alloc: fix pcp->count race between drain_pages_zone() vs __rmqueue_pcplist()
mm: memcg: add cacheline padding after lruvec in mem_cgroup_per_node
alloc_tag: outline and export free_reserved_page()
decompress_bunzip2: fix rare decompression failure
mm/huge_memory: avoid PMD-size page cache if needed
mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines
mm: fix old/young bit handling in the faulting path
dt-bindings: arm: update James Clark's email address
MAINTAINERS: mailmap: update James Clark's email address
- Stop testing the group->parent pointer as it is not guaranteed to be
stable over a chain of operations by design. This includes a warning
which would be nice to have but it produces false positives due to
the racy nature of the check.
- Plug a race between CPUs going in and out of idle and a CPU hotplug
operation. The latter can create and connect a new hierarchy level
which is missed in the concurrent updates of CPUs which go into idle.
As a result the events of such a CPU might not be processed and
timers go stale.
Cure it by splitting the hotplug operation into a prepare and online
callback. The prepare callback is guaranteed to run on an online and
therefore active CPU. This CPU updates the hierarchy and being online
ensures that there is always at least one migrator active which
handles the modified hierarchy correctly when going idle. The online
callback which runs on the incoming CPU then just marks the CPU
active and brings it into operation.
- Improve tracing and polish the code further so it is more obvious
what's going on.
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Merge tag 'timers-urgent-2024-07-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer migration updates from Thomas Gleixner:
"Fixes and minor updates for the timer migration code:
- Stop testing the group->parent pointer as it is not guaranteed to
be stable over a chain of operations by design.
This includes a warning which would be nice to have but it produces
false positives due to the racy nature of the check.
- Plug a race between CPUs going in and out of idle and a CPU hotplug
operation. The latter can create and connect a new hierarchy level
which is missed in the concurrent updates of CPUs which go into
idle. As a result the events of such a CPU might not be processed
and timers go stale.
Cure it by splitting the hotplug operation into a prepare and
online callback. The prepare callback is guaranteed to run on an
online and therefore active CPU. This CPU updates the hierarchy and
being online ensures that there is always at least one migrator
active which handles the modified hierarchy correctly when going
idle. The online callback which runs on the incoming CPU then just
marks the CPU active and brings it into operation.
- Improve tracing and polish the code further so it is more obvious
what's going on"
* tag 'timers-urgent-2024-07-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers/migration: Fix grammar in comment
timers/migration: Spare write when nothing changed
timers/migration: Rename childmask by groupmask to make naming more obvious
timers/migration: Read childmask and parent pointer in a single place
timers/migration: Use a single struct for hierarchy walk data
timers/migration: Improve tracing
timers/migration: Move hierarchy setup into cpuhotplug prepare callback
timers/migration: Do not rely always on group->parent
* Support for NUMA (via SRAT and SLIT), console output (via SPCR), and
cache info (via PPTT) on ACPI-based systems.
* The trap entry/exit code no longer breaks the return address stack
predictor on many systems, which results in an improvement to trap
latency.
* Support for HAVE_ARCH_STACKLEAK.
* The sv39 linear map has been extended to support 128GiB mappings.
* The frequency of the mtime CSR is now visible via hwprobe.
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Merge tag 'riscv-for-linus-6.11-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull more RISC-V updates from Palmer Dabbelt:
- Support for NUMA (via SRAT and SLIT), console output (via SPCR), and
cache info (via PPTT) on ACPI-based systems.
- The trap entry/exit code no longer breaks the return address stack
predictor on many systems, which results in an improvement to trap
latency.
- Support for HAVE_ARCH_STACKLEAK.
- The sv39 linear map has been extended to support 128GiB mappings.
- The frequency of the mtime CSR is now visible via hwprobe.
* tag 'riscv-for-linus-6.11-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (21 commits)
RISC-V: Provide the frequency of time CSR via hwprobe
riscv: Extend sv39 linear mapping max size to 128G
riscv: enable HAVE_ARCH_STACKLEAK
riscv: signal: Remove unlikely() from WARN_ON() condition
riscv: Improve exception and system call latency
RISC-V: Select ACPI PPTT drivers
riscv: cacheinfo: initialize cacheinfo's level and type from ACPI PPTT
riscv: cacheinfo: remove the useless input parameter (node) of ci_leaf_init()
RISC-V: ACPI: Enable SPCR table for console output on RISC-V
riscv: boot: remove duplicated targets line
trace: riscv: Remove deprecated kprobe on ftrace support
riscv: cpufeature: Extract common elements from extension checking
riscv: Introduce vendor variants of extension helpers
riscv: Add vendor extensions to /proc/cpuinfo
riscv: Extend cpufeature.c to detect vendor extensions
RISC-V: run savedefconfig for defconfig
RISC-V: hwprobe: sort EXT_KEY()s in hwprobe_isa_ext0() alphabetically
ACPI: NUMA: replace pr_info with pr_debug in arch_acpi_numa_init
ACPI: NUMA: change the ACPI_NUMA to a hidden option
ACPI: NUMA: Add handler for SRAT RINTC affinity structure
...
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Merge tag 'for-linus-6.11-rc1a-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Two fixes for issues introduced in this merge window:
- fix enhanced debugging in the Xen multicall handling
- two patches fixing a boot failure when running as dom0 in PVH mode"
* tag 'for-linus-6.11-rc1a-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
x86/xen: fix memblock_reserve() usage on PVH
x86/xen: move xen_reserve_extra_memory()
xen: fix multicall debug data referencing
hostfs not keep the host directory when mounting. When the host
directory is none (default), fc->source is used as the host root
directory, and this is wrong. Here we use `parse_monolithic` to
handle the old mount path for parsing the root directory. For new
mount path, The `parse_param` is used for the host directory parse.
Reported-and-tested-by: Maciej Żenczykowski <maze@google.com>
Fixes: cd140ce9f6 ("hostfs: convert hostfs to use the new mount API")
Link: https://lore.kernel.org/all/CANP3RGceNzwdb7w=vPf5=7BCid5HVQDmz1K5kC9JG42+HVAh_g@mail.gmail.com/
Cc: Christian Brauner <brauner@kernel.org>
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://lore.kernel.org/r/20240725065130.1821964-1-lihongbo22@huawei.com
[brauner: minor fixes]
Signed-off-by: Christian Brauner <brauner@kernel.org>
Christian noticed that it is possible for a privileged user to mount
most filesystems with a non-initial user namespace in sb->s_user_ns.
When fsopen() is called in a non-init namespace the caller's namespace
is recorded in fs_context->user_ns. If the returned file descriptor is
then passed to a process priviliged in init_user_ns, that process can
call fsconfig(fd_fs, FSCONFIG_CMD_CREATE), creating a new superblock
with sb->s_user_ns set to the namespace of the process which called
fsopen().
This is problematic. We cannot assume that any filesystem which does not
set FS_USERNS_MOUNT has been written with a non-initial s_user_ns in
mind, increasing the risk for bugs and security issues.
Prevent this by returning EPERM from sget_fc() when FS_USERNS_MOUNT is
not set for the filesystem and a non-initial user namespace will be
used. sget() does not need to be updated as it always uses the user
namespace of the current context, or the initial user namespace if
SB_SUBMOUNT is set.
Fixes: cb50b348c7 ("convenience helpers: vfs_get_super() and sget_fc()")
Reported-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Seth Forshee (DigitalOcean) <sforshee@kernel.org>
Link: https://lore.kernel.org/r/20240724-s_user_ns-fix-v1-1-895d07c94701@kernel.org
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
In a commit 1d717123bb ("ALSA: firewire-lib: Avoid
-Wflex-array-member-not-at-end warning"), DEFINE_FLEX() macro was used to
handle variable length of array for header field in struct fw_iso_packet
structure. The usage of macro has a side effect that the designated
initializer assigns the count of array to the given field. Therefore
CIP_HEADER_QUADLETS (=2) is assigned to struct fw_iso_packet.header,
while the original designated initializer assigns zero to all fields.
With CIP_NO_HEADER flag, the change causes invalid length of header in
isochronous packet for 1394 OHCI IT context. This bug affects all of
devices supported by ALSA fireface driver; RME Fireface 400, 800, UCX, UFX,
and 802.
This commit fixes the bug by replacing it with the alternative version of
macro which corresponds no initializer.
Cc: stable@vger.kernel.org
Fixes: 1d717123bb ("ALSA: firewire-lib: Avoid -Wflex-array-member-not-at-end warning")
Reported-by: Edmund Raile <edmund.raile@proton.me>
Closes: https://lore.kernel.org/r/rrufondjeynlkx2lniot26ablsltnynfaq2gnqvbiso7ds32il@qk4r6xps7jh2/
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20240725155640.128442-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This reverts commit d3155742db.
The header_length field is byte unit, thus it can not express the number of
elements in header field. It seems that the argument for counted_by
attribute can have no arithmetic expression, therefore this commit just
reverts the issued commit.
Suggested-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20240725161648.130404-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
The minmax infrastructure is overkill for simple constants, and can
cause huge expansions because those simple constants are then used by
other things.
For example, 'pageblock_order' is a core VM constant, but because it was
implemented using 'min_t()' and all the type-checking that involves, it
actually expanded to something like 2.5kB of preprocessor noise.
And when that simple constant was then used inside other expansions:
#define pageblock_nr_pages (1UL << pageblock_order)
#define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
and we then use that inside a 'max()' macro:
case ISOLATE_SUCCESS:
update_cached = false;
last_migrated_pfn = max(cc->zone->zone_start_pfn,
pageblock_start_pfn(cc->migrate_pfn - 1));
the end result was that one statement expanding to 253kB in size.
There are probably other cases of this, but this one case certainly
stood out.
I've added 'MIN_T()' and 'MAX_T()' macros for this kind of "core simple
constant with specific type" use. These macros skip the type checking,
and as such need to be very sparingly used only for obvious cases that
have active issues like this.
Reported-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/all/36aa2cad-1db1-4abf-8dd2-fb20484aabc3@lucifer.local/
Cc: David Laight <David.Laight@aculab.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We have some very fancy min/max macros that have tons of sanity checking
to warn about mixed signedness etc.
This is all things that a sane compiler should warn about, but there are
no sane compiler interfaces for this, and '-Wsign-compare' is broken [1]
and not useful.
So then we compensate (some would say over-compensate) by doing the
checks manually with some truly horrid macro games.
And no, we can't just use __builtin_types_compatible_p(), because the
whole question of "does it make sense to compare these two values" is a
lot more complicated than that.
For example, it makes a ton of sense to compare unsigned values with
simple constants like "5", even if that is indeed a signed type. So we
have these very strange macros to try to make sensible type checking
decisions on the arguments to 'min()' and 'max()'.
But that can cause enormous code expansion if the min()/max() macros are
used with complicated expressions, and particularly if you nest these
things so that you get the first big expansion then expanded again.
The xen setup.c file ended up ballooning to over 50MB of preprocessed
noise that takes 15s to compile (obviously depending on the build host),
largely due to one single line.
So let's split that one single line to just be simpler. I think it ends
up being more legible to humans too at the same time. Now that single
file compiles in under a second.
Reported-and-reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/all/c83c17bb-be75-4c67-979d-54eee38774c6@lucifer.local/
Link: https://staticthinking.wordpress.com/2023/07/25/wsign-compare-is-garbage/ [1]
Cc: David Laight <David.Laight@aculab.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
